Hydride platinum gold clusters: synthesis and characterization

Bour, J. J.; Schlebos, P. P. J.; Kanters, R. P. F.; Schoondergang, M. F. J.; Addens, H.; Overweg, A.R.; Steggerda, J. J.

doi:10.1016/s0020-1693(00)86810-3

Cited by 19 publications

(18 citation statements)

References 14 publications

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“…Next, we turn to the discussion of the NMR shift of the hydrogen in the metal cores of 1 and 2. The hydrogen peak of 1 was observed at 15.1 ppm 20 in comparison with the previously reported 5.4 ppm for 2 21 , 22 (Table 2 and Supplementary Table 2 ). This anomalously large difference (Δ = 9.7 ppm) is rather surprising in view of similar atomic geometries of 1 and 2.…”

Section: Resultssupporting

confidence: 78%

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Magnetically induced currents and aromaticity in ligand-stabilized Au and AuPt superatoms

et al. 2021

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Understanding magnetically induced currents (MICs) in aromatic or metallic nanostructures is crucial for interpreting local magnetic shielding and NMR data. Direct measurements of the induced currents have been successful only in a few planar molecules but their indirect effects are seen in NMR shifts of probe nuclei. Here, we have implemented a numerically efficient method to calculate gauge-including MICs in the formalism of auxiliary density functional theory. We analyze the currents in two experimentally synthesized gold-based, hydrogen-containing ligand-stabilized nanoclusters [HAu9(PPh3)8]2+ and [PtHAu8(PPh3)8]+. Both clusters have a similar octet configuration of Au(6s)-derived delocalized “superatomic” electrons. Surprisingly, Pt-doping in gold increases the diatropic response of the superatomic electrons to an external magnetic field and enhances the aromaticity of [PtHAu8(PPh3)8]+. This is manifested by a stronger shielding of the hydrogen proton in the metal core of the cluster as compared to [HAu9(PPh3)8]2+, causing a significant upfield shift in agreement with experimental proton NMR data measured for these two clusters. Our method allows the determination of local magnetic shielding properties for any component in large 3D nanostructures, opening the door for detailed interpretation of complex NMR spectra.

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Section: Resultssupporting

confidence: 78%

“… 20 , 30 ) and [HPtAu 8 (PPh 3 ) 8 ] + (2, ref. 21 , 22 ). The position of the hydrogen atom in the metal core has been previously deduced by NMR analysis in clusters 1 20 and 2 21 , 22 .…”

Section: Resultsmentioning

confidence: 99%

Magnetically induced currents and aromaticity in ligand-stabilized Au and AuPt superatoms

et al. 2021

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“…There are three undeca-metal clusters, Hg 3 Fe 8 [121], Hg 2 Au 8 Pt [138] and HgOs 10 [139]. The molecular structure of the first example [121] is shown in Figure 8.…”

Section: Heterooligonuclear Compoundsmentioning

confidence: 99%

“…The central Hg(l) atom lies on a crystallographic inversion centre, so that the Fe(1)-Hg(1)-Fe(1') angle is exactly 180°. In the second example [138] the metal frame has approximately D 2d symmetry in a centred The bimetallic red HgRu 12 cluster [141 ] consists of twodistorted Ru 6 C(CO) 16 octahedra linked by two edge-related ruthenium atoms to a central mercury atom. Each of these two octahedra contain an interstitial carbon atom.…”

Section: Heterooligonuclear Compoundsmentioning

confidence: 99%

Heterometallic Mercury Compounds: Classification and Analysis of Crystallographical and Structural Data

Holloway¹,

Melnı́k²

1994

Main Group Metal Chemistry

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Mercury is classed as a heavy metal both from its physical properties and its biochemical behaviour.This review includes over two hundred heterometallic mercury compounds of known crystal structure.The heterometal atoms include both transition and non-transition metals, including both hard (class A) and soft (class B) examples. The compounds range from simple hetero-double salts and hetero-bimetallic derivatives to heterometallic clusters of up to twenty one metal atoms. Examples of isomerism include distortion, polymer and linkage isomers. Correlations between structural parameters, heterometal and ligand donor atoms are developed and an overall summary of the metal-metal bonding distances is given.

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“…Outra possibilidade, pouco comum, é a substituição do ligante ligado ao metal central, como se observa no exemplo a seguirC 54 ) .…”

Section: Au Ou Ao Metal Central (M)unclassified

A química dos clusters da paládio e ouro com os ligantes isonitrilas

Takata¹

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Hydride platinum gold clusters: synthesis and characterization

Cited by 19 publications

References 14 publications

Magnetically induced currents and aromaticity in ligand-stabilized Au and AuPt superatoms

Magnetically induced currents and aromaticity in ligand-stabilized Au and AuPt superatoms

Heterometallic Mercury Compounds: Classification and Analysis of Crystallographical and Structural Data

A química dos clusters da paládio e ouro com os ligantes isonitrilas

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